package com.hfkh.java45.javaoop403;

public class Test {
	public static void main(String[] args) {
//		Ink ink = new ColorInk();
//		Paper paper = new B5Paper();
//		Printer printer = new Printer();
//		printer.print(ink, paper);
		
		String str = new String("helloworld");
		
		System.out.println(str.toUpperCase());
	}
}
